﻿Related 
  Sedimentary 
  Surface 
  Forms. 
  

  

  171 
  

  

  Table 
  IV. 
  — 
  Observational 
  Data 
  on 
  Subaqueous 
  Sand 
  -Waves. 
  a 
  

  

  Author. 
  

  

  Locality. 
  

  

  I 
  

  

  cm. 
  

  

  | 
  (average) 
  

  

  1. 
  Tidal 
  meta-ripples, 
  exposed\ 
  

  

  Kindle, 
  1917 
  

   Cornish, 
  

  

  1901 
  

  

  Kindle, 
  1917 
  

   Cornish, 
  

  

  1901 
  

  

  Kindle, 
  1917 
  

   Cornish, 
  

  

  1901 
  

  

  St. 
  Mary 
  Bay, 
  N. 
  S. 
  . 
  

   Findhorn, 
  Scotland. 
  

   Mundsley, 
  Norfolk 
  

   open 
  shore 
  

  

  Kingsport, 
  N. 
  S 
  

  

  61-121 
  

   107 
  

  

  147 
  

   152-244 
  

  

  Barmouth, 
  Wales 
  

   open 
  shore 
  

  

  Montrose, 
  Scotland... 
  

   Dovey 
  estuary, 
  Wales. 
  

   Goodwin 
  Sands, 
  Kent 
  

   open 
  sea, 
  6 
  miles 
  from 
  

   shore 
  

  

  275 
  

   402 
  

   400 
  

  

  456 
  

  

  Windsor, 
  N. 
  S 
  j 
  456-610 
  

  

  Severn 
  estuary, 
  Wales! 
  1150 
  

   2. 
  Meta-ripples 
  in 
  rivers 
  ex 
  

  

  a 
  

  

  cm. 
  

  

  (average 
  

  

  posed 
  at 
  low 
  water. 
  

  

  Bucher 
  ; 
  Little 
  Miami, 
  Ohio 
  

  

  Kindle, 
  191 
  7 
  Ottawa 
  E., 
  Ont 
  

  

  3. 
  Sand-waves 
  in 
  rivers 
  in 
  

   motion. 
  

  

  Hider, 
  1883|Mississippi 
  river 
  

  

  jLake 
  Providence, 
  La. 
  

  

  1. 
  Shallow 
  water 
  section, 
  at 
  

   high 
  water. 
  

   sandbank 
  2000' 
  

  

  shore 
  - 
  

  

  1200' 
  from 
  shore 
  

   800' 
  " 
  

   400' 
  " 
  

  

  from 
  

  

  275 
  

   912-1370 
  

  

  Same 
  at 
  low 
  ivater. 
  

  

  1200' 
  from 
  shore 
  

  

  j 
  800' 
  " 
  " 
  

  

  i 
  400' 
  " 
  " 
  

  

  Deep 
  ivater 
  section 
  at 
  high 
  

   ivater. 
  

  

  600' 
  from 
  shore 
  

  

  1000' 
  " 
  " 
  

  

  1400' 
  " 
  " 
  

  

  Johnson 
  

  

  4. 
  Same 
  at 
  low 
  ivater. 
  

  

  600' 
  from 
  shore 
  

  

  1000' 
  " 
  " 
  

  

  1400' 
  " 
  " 
  

  

  Mississippi 
  river, 
  at 
  

   Helena, 
  Ark 
  

  

  187! 
  

  

  1370 
  

  

  7620 
  

   12192 
  

  

  22860 
  

  

  7620 
  

  

  8077 
  

   7315 
  

  

  9449 
  

  

  8757 
  

  

  12192 
  

  

  8321 
  

  

  9357 
  

  

  12040 
  

  

  10000 
  

  

  7-15 
  

  

  7-13 
  

  

  35 
  

   16 
  

  

  13-51 
  

   59 
  

  

  15 
  

   30-61 
  

  

  30-101 
  

   244 
  

   366 
  

  

  558 
  

  

  152 
  

   204 
  

   244 
  

  

  152 
  

   201 
  

  

  192 
  

   198 
  

  

  152 
  

  

  I 
  

   a 
  

  

  (average) 
  

  

  (8-17) 
  

  

  17 
  

   (12-35) 
  

  

  12 
  

  

  25 
  

  

  20 
  

  

  18 
  f 
  

   (15-45) 
  

  

  13-45 
  

   31 
  

   33 
  

  

  41 
  

  

  50 
  

   40 
  

   30 
  

  

  62 
  

  

  43 
  

   45 
  

  

  43 
  

  

  47 
  

   40 
  

  

  exposed 
  at 
  

   low 
  tide 
  

  

  11-16 
  

   17-68 
  

   24-38 
  

   2743 
  

  

  8-53 
  

   15-24 
  

   18-29 
  

  

  24-29 
  

   26-30 
  

   24-26 
  

  

  (17-23) 
  

   (18-24) 
  

  

  (17-23) 
  

  

  4-9-15 
  

  

  v 
  

   m./sec. 
  

  

  mm. 
  /sec. 
  

  

  l-l-5 
  d 
  (s) 
  

  

  (smallest) 
  

  

  (greatest) 
  

  

  (1-09 
  (m) 
  

   average 
  

  

  for 
  

   month) 
  

  

  0-05 
  

   0-07 
  

   0-12 
  

  

  0-04 
  

   0-03 
  

  

  0-16 
  

   0-13 
  

  

  0-04 
  

   0.03 
  

  

  0-06 
  

  

  a 
  All 
  figures 
  transformed 
  from 
  feet 
  and 
  inches 
  to 
  nearest 
  centimeter. 
  The 
  symbols 
  the 
  same 
  

   as 
  those 
  used 
  on 
  Table 
  II. 
  

  

  b 
  For 
  the 
  Newarp 
  banks, 
  twenty 
  miles 
  SE 
  of 
  Mundsley, 
  7 
  miles 
  off 
  the 
  coast, 
  tidal 
  currents 
  

   running 
  from 
  1 
  to 
  2 
  m./sec. 
  are 
  recorded 
  in 
  the 
  British 
  Island 
  Pilot, 
  vol. 
  7, 
  1915 
  (No. 
  150, 
  Publ. 
  

   U. 
  S. 
  Hydrographic 
  Office). 
  

  

  c 
  In 
  Montrose 
  harbour 
  the 
  tidal 
  current 
  at 
  times 
  reaches 
  the 
  velocity 
  of 
  2 
  6 
  m./sec. 
  (quoted 
  

   by 
  Cornish 
  from 
  North 
  Sea 
  Pilot, 
  Pt. 
  2, 
  5th 
  edit., 
  1895). 
  

  

  d 
  Greatest 
  velocity 
  of 
  tidal 
  currents 
  at 
  neap 
  and 
  spring 
  tides; 
  quoted 
  bv 
  Cornish 
  from 
  King's 
  

   Pilot 
  for 
  the 
  English 
  Channel, 
  12th 
  edit., 
  p. 
  143. 
  

  

  e 
  26-5-3 
  m./sec. 
  given 
  for 
  the 
  tidal 
  portion 
  of 
  Severn 
  by 
  Grabau 
  (Princ. 
  of 
  Stratigr., 
  1913, 
  

   p. 
  663). 
  Cornish 
  emphasizes 
  the 
  fact 
  that 
  ridges 
  do 
  not 
  form 
  in 
  center 
  of 
  most 
  violent 
  current 
  

   (p. 
  185). 
  

  

  f 
  Horizontal 
  form 
  index— 
  10. 
  

  

  